Download PDF by J. L. C. Martin-Doyle (Auth.): A Synopsis of Ophthalmology

By J. L. C. Martin-Doyle (Auth.)

ISBN-10: 1483283054

ISBN-13: 9781483283050

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Example text

T h i s is a complication t h a t m a y arise following a perforating injury o f t h e cornea in spite o f t h e best t r e a t m e n t . Thanks t o steroid t h e r a p y this complication is less dreaded than formerly. —Any severe corneal wound (including cataract sections) can lead t o this e x t r e m e l y g r a v e condition in which t h e e y e becomes t o all intents and purposes an abscess c a v i t y which eventually forms granulation tissue and is vascularized from t h e choroidal vessels.

T h e vesicles h a v e broken d o w n and t i n y ulcers appear. These are so small t h a t in the early stages t h e y are difficult t o detect. T h e y spread dendritically, and on staining g i v e a characteristic appearance, branching in a n y or all directions. I t is a v e r y painful condition w i t h much lacrimation and photophobia, and in the absence o f proper treatment tends t o last for weeks or e v e n months, and t o produce dense scarring. I t is believed t h a t in some untreated cases the deeper corneal tissues b e c o m e i n v o l v e d leading eventually t o diskiform keratitis ( q .

A t its periphery the cornea is slightly overlapped b y the sclerotic in the same w a y as a watch glass is overlapped b y the rim. Section of the cornea reveals the following layers : — 1. S T R A T I F I E D E P I T H E L I U M . 2. B O W M A N ' S M E M B R A N E . — A structureless but important membrane, since once it is destroyed regeneration never occurs and a permanent opacity results. 3. S U B S T A N T I A P R O P R I A . — A l t h o u g h perfectly transparent, this consists of laminated fibrous connective tissue, microscopically almost e x a c t l y resembling the sclerotic.

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A Synopsis of Ophthalmology by J. L. C. Martin-Doyle (Auth.)

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